This policy brief reviews the data, research, and policy landscapes of harsh discipline including suspension, expulsion, corporal punishment, seclusion, and the inappropriate use of restraint. It provides a robust policy agenda to reduce its use. This is part of a broader effort launched in 2019 by the Children’s Equity Project and the Bipartisan Policy Center with support from the Heising Simons Foundation. Our goal was to better understand the equity data, research, and policy landscapes in learning systems across three key policy areas: discipline, inclusion, and dual language learning (author abstract)